Alert archive / Pennsylvania / River Flood Warnings in 2020
River Flood Warning 42, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Nov 30, 2020, 5:35 PM EST for Delaware County, Pennsylvania. It took effect at Nov 30, 2020, 5:43 PM EST. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 30, 2020, 5:35 PM EST (22:35 UTC)
- In effect from
- Nov 30, 2020, 5:43 PM EST
- Expired
- Nov 30, 2020, 9:28 PM EST
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- Minor
County Delaware County, PA
The radar
The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 22:36 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The river
Written for the forecast point Chester Creek near Chester (CHSP1). The gauge peaked at 8.16 ft at Nov 30, 2020, 6:00 PM EST.
- Action stage
- 7 ft
- Minor stage
- 8 ft
- Moderate stage
- 10 ft
- Major stage
- 14 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 01477000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted.
120 WGUS41 KPHI 302235 FLWPHI BULLETIN - EAS ACTIVATION REQUESTED Flood Warning National Weather Service Mount Holly NJ 535 PM EST Mon Nov 30 2020 ...The National Weather Service in Mount Holly NJ has issued a Flood Warning for the following rivers in Pennsylvania... Chester Creek Near Chester affecting Delaware County. For the Chester Creek...including Chester...Minor flooding is forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Additional information is available at www.weather.gov/phi. PAC045-010730- /O.NEW.KPHI.FL.W.0042.201130T2243Z-201201T0718Z/ /CHSP1.1.ER.201130T2243Z.201130T2300Z.201201T0117Z.NO/ 535 PM EST Mon Nov 30 2020 The National Weather Service in Mount Holly has issued a * Flood Warning for the Chester Creek Near Chester. * Until late tonight. * At 5:30 PM EST Monday the stage was 7.7 feet. * Flood stage is 8.0 feet. * Minor flooding is forecast. * Forecast...The river is expected to rise above flood stage late this afternoon to a crest of 8.4 feet this evening. It will then fall below flood stage this evening. * Impact at 7.0 feet...The creek floods adjacent open land. * Flood History...This crest compares to a previous crest of 8.6 feet on 09/18/2004. && Stream Fld Observed Fcsts (6 pm) Crest Location Stg Stg Day/Time Tue Wed Stg Time Date Chester Creek Chester 8.0 7.7 Mon 5 pm 3.6 MSG 8.4 6pm 11/30 && LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547 $$ PO
2 follow-up statements
862 WGUS41 KPHI 010108 FLWPHI BULLETIN - EAS ACTIVATION REQUESTED Flood Warning National Weather Service Mount Holly NJ 808 PM EST Mon Nov 30 2020 ...Observed flooding changed to Minor severity and increased in duration for the following rivers in Pennsylvania... Chester Creek Near Chester affecting Delaware County. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Additional information is available at www.weather.gov/phi. PAC045-010600- /O.EXT.KPHI.FL.W.0042.000000T0000Z-201201T0600Z/ /CHSP1.N.ER.201130T2251Z.201130T2316Z.201130T2351Z.NO/ 808 PM EST Mon Nov 30 2020 ...Observed flooding increased to Minor severity and increased in duration until just after midnight tonight... The Flood Warning continues for the Chester Creek Near Chester. * Until late tonight. * At 7:46 PM EST Monday the stage was 7.4 feet. * Flood stage is 8.0 feet. * Minor flooding is occurring. * Recent Activity...The maximum river stage in the 24 hours ending at 7:46 PM EST Monday was 8.2 feet. * Forecast...The river is expected to continue to slowly fall this evening. * Impact at 7.0 feet...The creek floods adjacent open land. * Flood History...This crest compares to a previous crest of 7.7 feet on 03/22/1999. && Stream Fld Observed Fcsts (8 pm) Crest Location Stg Stg Day/Time Tue Stg Time Date Chester Creek Chester 8.0 7.4 Mon 7 pm 3.6 7.5 9pm 11/30 && LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547 $$ BAH
706 WGUS81 KPHI 010228 FLSPHI Flood Statement National Weather Service Mount Holly NJ 928 PM EST Mon Nov 30 2020 ...The Flood Warning is cancelled for the Chester Creek near Chester... PAC045-010330- /O.CAN.KPHI.FL.W.0042.000000T0000Z-201201T0228Z/ /CHSP1.N.ER.700119T1419Z.700119T1419Z.700119T1419Z.NO/ 928 PM EST Mon Nov 30 2020 ...The Flood Warning for the Chester Creek Near Chester has been cancelled... The Flood Warning is cancelled for the Chester Creek Near Chester. * At 9:15 PM Monday the creek level was 7.3 feet. * Flood stage is 8.0 feet. * Forecast...The creek level is expected to continue falling overnight. && Stream Fld Observed Fcsts (9 pm) Crest Location Stg Stg Day/Time Tue Wed Stg Time Date Chester Creek Chester 8.0 7.3 Mon 9 pm 3.3 MSG Crested && LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547 $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 12:15 PM EST | Areal Flood Advisory | PHI | Chester, Delaware | 3 hr |
| Nov 30, 12:41 PM EST | Special Weather Statement | PHI | Chester, Montgomery | 49 min |
| Nov 30, 2:17 PM EST | Areal Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 9 hr |
| Nov 30, 2:18 PM EST | Coastal Flood Advisory | PHI | Bucks, Delaware, Philadelphia | 2 hr |
| Nov 30, 2:41 PM EST | Severe Thunderstorm Warning | PHI | Chester, Delaware | 49 min |
| Nov 30, 2:48 PM EST | Areal Flood Warning | PHI | Chester, Delaware, Montgomery | 8 hr |
| Nov 30, 3:01 PM EST | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 44 min |
| Nov 30, 3:26 PM EST | Areal Flood Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Nov 30, 3:43 PM EST | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Monroe, Montgomery, Northampton and 1 more | 47 min |
| Nov 30, 3:51 PM EST | River Flood Warning | PHI | Chester | 14 hr |
| Nov 30, 3:53 PM EST | Areal Flood Warning | PHI | Monroe, Northampton | 16 hr |
| Nov 30, 3:53 PM EST | Tornado Warning | PHI | Bucks, Montgomery | 13 min |
| Nov 30, 4:17 PM EST | Areal Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 10 hr |
| Nov 30, 5:30 PM EST | River Flood Warning | PHI | Chester, Delaware | 16 hr |
| Nov 30, 5:33 PM EST | River Flood Warning | PHI | Montgomery | 10 hr |
Nearby
River Flood Warnings in Pennsylvania, 2020Every river flood warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.